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Finding the Fourth Proportional to 85,424.80, 128,098.80 and 32,816.80

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Solution

The fourth proportional to 85,424.80, 128,098.80 and 32,816.80 is: 49,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,424.80 : 128,098.80 = 32,816.80 : x
  2. Step 2: Convert to fraction form
    85,424.80/128,098.80 = 32,816.80/x
  3. Step 3: Cross multiply
    85,424.80x = 128,098.80 × 32,816.80
  4. Step 4: Simplify right side
    85,424.80x = 4,203,792,699.84
  5. Step 5: Solve for x
    x = 4,203,792,699.84/85,424.80
  6. Step 6: Final answer
    x = 49,210.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.